Electronic Invoicing Systems in International Tax Practice: Legal Foundations and National Implementation Models

Abstract

This thesis analyzes the rapid integration of electronic invoicing (e-invoicing) systems and Continuous Transaction Controls (CTC) into global tax administration, evaluating their legal, ethical, and regulatory implications. As governments worldwide transition from retrospective auditing to proactive digital compliance, e-invoicing has become a fundamental pillar of international tax enforcement. The study meticulously examines the foundational legal frameworks established by the United Nations Commission on International Trade Law (UNCITRAL) and juxtaposes them against the strict data privacy requirements of the European Union’s General Data Protection Regulation (GDPR), highlighting the “transparency paradox” inherent in automated tax supervision. Furthermore, the document provides an in-depth comparative analysis of major implementation architectures, including the European Union’s VAT in the Digital Age (ViDA) reforms, the centralized clearance models of Latin America (Brazil and Mexico), and the phased integrations in the Middle East and Asia (Saudi Arabia and India). Special attention is devoted to the Republic of Uzbekistan’s “SoliqOnline” ecosystem and its newly launched 2026 real-time risk-scoring platform, demonstrating how emerging economies are leveraging automated data analytics to guarantee budget revenues, mitigate the shadow economy, and navigate the complex administrative impacts on small and medium-sized enterprises (SMEs).